| 词条 | Halorhabdus |
| 释义 |
| domain = Archaea | regnum = Euryarchaeota | phylum = Euryarchaeota | classis = Halobacteria | ordo = Halobacteriales | familia = Halobacteriaceae | genus = Halorhabdus | genus_authority = Wainø et al. 2000 emend. Antunes et al. 2008{{citation needed|date=October 2016}} | subdivision_ranks = Species | subdivision =
}} In taxonomy, Halorhabdus is a genus of the Halobacteriaceae. Description and significanceHalorhabdus utahensis (salt-loving rod) is a motile, Gram-negative, extremely halophilic archaeon that forms red, circular colonies. It grows at the temperatures between 17 and 55 °C, with optimal growth occurring at 50 °C. It can also grow over a pH range of 5.5–8.5 with the optimal pH value between 6.7 and 7.1. Further, with its extremely high salinity optimum of 27% NaCl, Halorhabdus has one of the highest reported salinity optima of any living organism. Genome structureThe genome of Halorhabdus was sequenced in August 2014.[1] The G + C content of its DNA is estimated to be 64%. Cell structure and metabolismThe cells of H. utahensis are extremely pleomorphic, exhibiting any shape from irregular coccoid or ellipsoid to triangular, club-shaped or rod-shaped forms. The rod-shaped and ellipsoid cells are 2-10 by 0.5-1 µm and 1-2 by 1 µm in size, respectively, and the spherical cells have a diameter of approximately 1 µm. The archaeon uses only a limited range of substrates, such as glucose, xylose, and fructose, for growth, and is unique in its inability to utilize yeast extract or peptone. Other substances that did not stimulate the organism's growth include organic acids, amino acids, alcohols, glycogen, and starch. EcologyStrains of H. utahensis were isolated from samples from Great Salt Lake, Utah, USA.[2] References1. ^{{cite journal|last1=Werner|first1=J|title=Halorhabdus tiamatea: proteogenomics and glycosidase activity measurements identify the first cultivated euryarchaeon from a deep-sea anoxic brine lake as potential polysaccharide degrader.|journal=Environmental Microbiology|date=Aug 2014|volume=16|issue=8|pages=2525–37|doi=10.1111/1462-2920.12393|pmid=24428220|pmc=4257568}} 2. ^See the NCBI [https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=146825 webpage on Halorhabdus]. Data extracted from the {{cite web | url=ftp://ftp.ncbi.nih.gov/pub/taxonomy/ | title=NCBI taxonomy resources | publisher=National Center for Biotechnology Information | accessdate=2007-03-19}} Further readingScientific journals
Scientific books
Scientific databases{{Taxonomic references|taxon=Halorhabdus}}External links{{Taxonomic links|microbe=yes|NCBI_taxID=146825|taxoname=Halorhabdus|LSPN_letter=h|LSPN_taxoname=halorhabdus}}{{Taxonbar|from=Q5643442}}{{archaea-stub}} 1 : Archaea genera |
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